In order to print successfully with Ember, the PDMS window of the resin tray must be clean and optically clear. The dirtier the PDMS is, the greater the likelihood becomes of print failure.
Here's how to clean the PDMS:
- Nitrile gloves
- Safety glasses
- A light-proof container in which to store resin
- Acetone (nail polish remover)
- Lens paper
- Paint strainer (if the resin needs to be filtered clean of cured parts)
- Put on nitrile gloves and safety glasses.
- Pour the resin out of the resin tray into a light-proof container. [If your previous print failed, pour the resin through a paint strainer, to remove any bits of cured resin.]
- Soak lens paper with acetone. Do not use isopropanol / isopropyl alcohol, as it won't work. Do not use paper towels, dirty rags, or anything abrasive, as this will scratch and damage the PDMS.
- Wipe the window with an acetone-soaked lens paper. Avoid touching the edge of the window frame, as the acetone will dissolve some material out of the frame.
- Breathe onto the window so that it fogs up. Wipe the window with a clean piece of lens cloth.
- Repeat until the window is clean and does not have spots or streaks.
If you have any questions about the process, post them in the comments.